In modern wastewater treatment, removing bacteria and contaminants is essential for maintaining safe, clean, and reusable water. A Dissolved Air Flotation system (DAF) is one of the most effective technologies for separating solids, oils, and organic matter from water. Although a DAF clarifier is not designed to directly kill bacteria, it plays a crucial role in significantly reducing bacterial presence through physical and chemical separation.
At Ishan Paryavaran Pvt. Ltd., our advanced Dual Clarifier DAF systems deliver high-efficiency water clarification for industrial and municipal applications.
What is a DAF clarifier?
A DAF clarifier (Dissolved Air Flotation) is a water treatment system that uses micro-air bubbles to lift suspended particles to the surface, where they are removed as sludge.
It helps to take away the following in the process:
- Suspended solids
- Oils and greases
- Algae
- Organic matter
- Pathogen-carrying particles
When combined with a DAF tank and coagulant dosing, it offers exceptional clarification efficiency.
How Does a DAF Clarifier Remove Bacteria?
1. Removal of Suspended Solids Carrying Bacteria
Most bacteria adhere to organic matter or solid particles in water.
A DAF clarifier injects pressurised air into the DAF tank, producing microbubbles that attach to these particles and cause them to float to the surface.
This removal of sludge also removes the bacteria attached to it.
2. Reducing Organic Load (Limiting Bacterial Growth)
Bacteria grow very rapidly in water containing high organic content.
A DAF system
- Removes fats, oils, and grease
- Reduces organic solids
- Reduces turbidity
Reducing the amount of food bacteria generally results in a downstream decrease in microbial activity.
3. Coagulants and Flocculants
Most industrial DAF systems—including the Dual Clarifier DAF by Ishan Paryavaran Pvt. Ltd.—work with coagulant and polymer dosing.
These chemicals:
- Trap bacteria inside flocs
- Help bacteria float with suspended solids.
- Impair some bacterial activity.
The process results in a large reduction of bacteria before final disinfection.
4. Removal of Algae and Pathogen Carriers
Algae and colloidal solids can often carry disease-causing microorganisms.
DAF clarifiers are very efficient at removing algae, which indirectly reduces:
- E. coli
- Total coliform
- Other waterborne pathogens
DAF Clarifier + Disinfection = Total Bacterial Removal
A DAF clarifier significantly reduces bacteria but does not eliminate them.
For full removal, industries typically add:
- UV disinfection
- Chlorination
- Ozonization
A combination that ensures water meets all standards of safety and discharge.
Why Choose Ishan Paryavaran Pvt. Ltd. for DAF Solutions?
Ishan Paryavaran Pvt. Ltd. is a manufacturer of high-performance wastewater treatment systems, including:
DAF – Dual Clarifier Systems
Advanced design to maximise solid separation efficiency.
High-Strength DAF Tanks
Durable corrosion-resistant tanks for industrial loads. Custom-engineered DAF clarifiers tailored for ETP, STP, food processing, textile, paper mill, and chemical industries.
Turnkey Installation & AMC Support End-to-end project execution with reliable after-sales service. Our DAF solutions ensure superior clarification, reduced bacterial load, and compliance with PCB standards due to precision engineering and proven performance.
Conclusion
A DAF clarifier is an indispensable unit in modern wastewater treatment for the effective removal of suspended solids, organic matter, algae, and bacteria-carrying particles from industrial inflow. It cannot destroy bacteria; instead, it removes a significant amount of bacteria to make the disinfection stage very effective. Through advanced Dual Clarifier DAF technology, strong and sturdy DAF tanks, and expertise in engineering, Ishan Paryavaran Pvt. Ltd. delivers reliable and efficient water treatment solutions for industries throughout India.
